There is a tornado warning on . My mother just told me she heard it on the radio .   What is a tornado warning ?   It means that a tornado has been seen somewhere in the area .   Really ? In New Berlin ?   No . Not necessarily in town . But in southern Wisconsin somewhere . A tornado has been spotted . They have two stages here.This is what is called a tornado watch . That means that the weather conditions are perfect for a tornado .   I understand . They think a tornado might come .   Yes . People should look out , because maybe there will be tornadoes coming.So it's called a watch .   And the second stage is called a tornado warning .   Yes . If a tornado has been spotted , they announce a tornado warning.So if there's a tornado warning on , it means a tornado is out there somewhere .   It's scary .   Well . Tornadoes can be dangerous , it's true.If we hear something like a loud train coming , then we have to go in the basement .   What do you mean a loud train ?   That is what tornadoes sound like . They sound like trains . They're very loud .   But if you hear them coming , isn't it already too late ?   Maybe . It depends on the tornado.Some can move across the ground at 200 miles an hour.That is very fast . Others aren't so fast .   Have you seen a lot of them ?   I've only seen one in my life . I was looking out the window . It was around two miles away . It was very interesting to watch.But it was heading toward my friend's house . So I quickly called them on the phone .   Did it hit their house ?   No , it didn't . But they are glad I called them .   What were they doing when you called ?   They were all sitting in the living room watching TV.They had no idea a tornado was coming toward their house.If it had hit them , they could have all been killed .   That's terrible . Do many people die in tornadoes ?   Not so many really . But a lot of houses are destroyed sometimes . 